| 摘要 |
PURPOSE:To obtain sound image moving effects capable of enlarging the sound image moving to outside of a speaker with simple constitution by inverting and controlling the phase relation with respect to an input music signal for every half period of a modulation signal. CONSTITUTION:A phase inversion control circuit 41 gives an input music signal SG as one input signal of a selection circuit 43, and simultaneously gives said signal as the 2nd input signal to the circuit 43 after said circuit 41 inverts a phase in a phase inversion circuit 44. On the other hand, an output of a selection circuit 14 is received by a polarity discrimination circuit 45, and the circuit 43 is controlled in such a way that it can select an output of the circuit 44 with the aid of a polarity discrimination output S11 when said output is negative. Thus, when the polarity of the output of the circuit 14 is positive, the signal SG is inputted to a multiplier circuit 42 through the circuit 43, while the signal SG is given to the circuit 42 through the circuit 43 after said signal SG is phase- inverted in the circuit 44, when the output of the circuit 14 is negative. The multiplied result is transmitted to a selection circuit 20. |
